Trip mechanism of two-revolution printing-presses.



H. PEARCE, T. R. G. PARKER & P. W. WRIGHT. TRIP MECHANISM OF TWO-REVOLUTION PRINTING PRESSES.

. APPLICATION FILED JAN.20, 1913. 1 1 06,403. Patented Au 11, 1914.

6 SHEETSSHEBT 1.

. THE NORRIS PETERS CO. PHOTb-LITHO. WASHINGTON. D. C

H. PEARCE, T. R. G. PARKER & F. W. WRIGHT. TRIP MECHANISM or TWO-REVOLUTION PRINTING PRBSSES. APPLICATION FILED JAN.20, 1913.

1,106,403. Patented Aug.11,1914.

G SHEETS-SHEET 2.

THE NORRIS PETERS (O.. PHOTO-LITHOW \VASHINGTON. D. (I

H. PEARCE, T. R. G. PARKER & F. W. WRIGHT.

TRIP MECHANISM OF TWO-REVOLUTION PRINTING PRESSES. APPLICATION FILED JAN.20,1913.

1,106,403. Patented Aug.11,1914.

6 SHEETSSHEET 3.

THE NORRIS PETERS ((1. PHO'I'D-LI'I'HO WASHINGTON. D. C.

1,106,403. Patented Aug.11.1914.

6 SHEETS-SHEET 4.

Hank/J Pearce THE NORRIS PETERS (4L PHOTO-LITHO" PVASHING'IUN, U

H. PEARCE, T. R. G. PARKER & F. W. WRIGHT. TRIP MECHANISM OF TWO-REVOLUTION PRINTING PRESSES.

APPLICATION I'ILED JAN.20, 1913. 1,106,403. Patented Aug. 11,1914.

6SHBETSSHEET 5.

Inzwni'ems. 00')? MM/Librmgi THE NORRIS PFTERS (UH PHUTO-LII'HDH WASHINGTON. D. C.

H. PEARCE, T. R. G. PARKER & F. W. WRIGHT. TRIP MECHANISM OF TWO-REVOLUTION PRINTINGPRESSES.

APPLICATION FILED 11111.20, 1913,

1,106,403. Patented Aug. 11.1914.

6 SHEETS-SHEET s.

Ewan/T01 5.

THE NORRVIS PETERS CO.. FHOTO-LITHll, WASHINGTON. D. C

sr'rns PATENT orrion,

HERBERT PEARCE, THOMAS ROBERT eILLEr'r PARKER, AND FRED wnsLnv WRIGHT,

or BROADI-IEATI-I, ENGLAND, ASSIGNORS OF LONDON, ENGLAND.

T0 LINOTYEE AND MACHINERY LIMITED,

TRIP MECHANISM OF TWO REVOLUTION PRINTING-PRESSES.

To all whom, it may concern: I

Be it known that we, HERBERT PEARCE,- THOMAS ROBERT GILLETT PARKER, and FRED WESLEY WRIGHT, subjects of the King of the United Kingdom of Great Britain and Ireland, residing zit-Linotype and Machinery Works, Broadheath, in the county of Chester, England, have invented new and useful Improvements in the Trip Mechanism of -Two-Revolution Printing-Presses, of which the following is a specification.

The present invention consists in improvements in the trip mechanism of two revolution printing presses described in our pending application for Letters Patent, Serial Number 710882, filed July 22nd 1912. Thesaid applicationdescribes, and illustrates in the respective Figures 1 and 1, automatic means for occasionally tripping the inking rollers of the form orplate cyl- 1 inder. These two figures are reproducedi herein for the purpose of this present application as FigsQ4 and 5. Referring toj them, 3 is the form or plate cylinder, and 37, 37 are the rollers for inking it. 38 is a 1 cam groove on one end of the cylinder 3,; rocks a double armed lever 39 fulcrumed on 1 the adjacent side frame. The opposite end i of this lever 39 is connected by a link 40 to a semi-circular pawl plate 41 loose at the feeder-side of the pressoii a transverse shaft 42. This plate 41 has an arcual recess in its semi-circular periphery, thereby establish ing two shoulders 43, 44. There is an arm 45 fast onthe said shaft 42 having pivoted on its outer end, a double pawl 46 the noses of which are adapted to engage withthe said shoulders alternately, according to the direction in which the pawl is rocked. This pawl 46 is so rocked by an eccentric grooved arm 47 engaging a roller on warm 48 projecting in a suitabledirection for the purpose, from the double pawl 46, the rocking motion being communicated to the grooved arm 47 fromthe feeders control pedal 24 through a bell crank lever 27 fulcrumed on the side frame, a horizontal push rod 49 and a coil spring 50 surrounding this rod 49 and compressible between a collar 51 fast on it and an arm 52 axially fastto the grooved arm 47 above mentioned. To trip the inkingrollers 37, the feeder depresses the pedal 24 and this, acting through the connections described, rocks the left-hand Specification of Letters Patent. 1 Patented Aug, 11 19j 4 Application filed January 20, 1913.

Serial No. 743,079.

46, is fast to the transverse shaft 42, the

latter is turned likewise. On an arm 53 fast to the outer-end of the said shaft 42,

are pivoted two pawls 54, 55, one on each side of the median line of the said arm; and, at its outer end, the said shaft 42- has a second pawl plate 58 of the sameshape as the one 41 alreadydescribed and mounted on the shaft in the same way. Both these pawls 54, 55, are urged by respective springs59, 60, which pull from the same pointon the median line, into contact with the said "second pawl plate 58 between theshoulders 61, 62, on it. The turning of the shaft 42 makes theright-hand one 55 of these two pawls, engage therespective shoulder 62 on the second pawl plate 58 and turn it, thereby,

throughsuitable link and lever connections or plate cylinder 3. Manual means for uni tripping and tripping theinking rollers 37 are also described and illustrated in the said figures and are as next described.

Referring to the accompanying" Figs. 4 and 5, 82 is a hand lever fast on the feeder side end of a transverse rock shaft 83 turning in a bearing 84 on a sideframe of the press and having an arm 85 fast to the inner end of it, the said arm 85 being connected by a link 86 to an arm 87 fast to the shaft 65 already described and through it and the connected parts, to the rollers 37.

The invention comprises means for enenergy necessary to trip the said rollers, passes from the last mentionedpawl plate 4L1-through the link 63, the rock shaft 65, the arm 64.- heretofore connectingthe two, and the arm 69 forming part of the inking ;mechanism trip proper say 70. Now, a

machine attendant often Wants to deposit an extra quantity on the transfer cylinder 2 or on the plate or form cylinder 3, according as to whether the press is an offset one or not, before he begins to print (thereby effecting an extra depositing of ink known as a rolling up in order that the inkabsorbing property of the transfer cylinder surface may be satisfied, and it, or the plate or form cylinder 3, made to effectively carry a sufficient quantity of ink to yield an impression on the sheet of the desired depth of color. Or, theneed to'increase the deposit may arise during the course of the job. To

enable him to do either of these things, he must be able to leave the inking rollers 37 untripped without interfering with the automatic tripping of the cylindersl, 3, or other organs of the press. The improved means are of a manual type forsevering and remaking at the respectively desiredmoments, the connection between the inking rollers and the above described means for; automatically tripping and untripping them and includes non-interference with the hand mechanism82 to 87 for tripping the inking rollers 37, if su'chnon-interference is desirable. -The invention further comprises auto-- matic means for preventing the inking rollvers rebounding toward the form or plate; "cylinder at the moment when the roller lifting device is moved smartly up against a fixed stop by the automatic roller tripping mechanism. The said means consists of a spring'rod pushing from a fixed abutment f upon an arm fast upon a rock shaft of the sald mechan sm, the sa1d rod and armbei'ng sopositionedrelatively to each other that they are-on a dead center when the inking rollers are on the cylinder and that the rod is exerting its maximum leverage on the arm at the moment the roller lifting device this'specification and afterward claimed.

I In the said drawings, Figure l is a side elevation of a part of:a press from the feeder side; Fig. 2, a side elevation of a part of the same pressfrorn the gear side Fig. 3,

an elevation of half the end ofa press. Figs. 4: and 5 together constitutea slde elevation from the feeder side of the presss Figs. 6 to 8 are details of the means for enabling the press attendant to increase the deposit ofink on either the transfer cylinder or the form cylinder. p

A preferred constructional form of the above mentioned means for enabling the press attendant to increase at any time dur-. ing the job, the quantity of ink being deposited per unit of area upon "either the transfer cylinder 2 or the plate or form cylinder 8 is illustrated in'the accompanying Figs. 1, 6, 7 and 8. It has already been explained that these improvedmeans are of a manual type for severing and remaking at the respectively desired moments, the connection between the inking rollers and the above described means for automatically tripping and untripping them and includes non-interference with the hand mechanism 82 to 87 for tripping the inkingrollers if suclrnon-interference is desirable. Accordingly, the link 63 above mentioned, ceases to be connected by a constantpivot with the rockshaft-65, but is, instead,conn'ected by a pivot of the same kind to a sec- -tor plate 941-l0ose on 'the'said shaft-65 and adapted to be operatively held to, or disconnectedfrom,-that shaft, by a springplunger working in {a horizontal socket 95* carried bythe, connecting ar1n'64 and cooperating with a socket 94?.in the section plate 94-. \Vhen the plunger 95 is in register with the socket 94 it is engaged therein by its spring 949 resilient between a shoulder within the socket 95 and one on the plungerv 95. The latter is disengaged from the said milled head 9-5 presented bythe plunger 95 outside the socket 95*,away from thelatter until the stud 95 fast on the'stemofthe plunger95, clears the slot 95 and then turning the head 95 until the said stud acts'as a detent to hold the plunger 95 disengaged from the sector plate by bearing against the outer'end of the socket 9'5 as shown in Fig. 7. When theattendant wantsv the plunger socket 95 qby the attendant pulling the 95 torengagewith the sector plate 94, he turns the milled head 95 until the stud, 95

registers with. the. slot 95, whereupon the spring 94* *pushesthe plunger 95 up to the said plate, and into the socket 94: as soon-as registration between plunger'and .socketL-occurs. 1 4 I A' preferred constructionalform of the above mentioned automatic 'means for pre venting the inking rollers 37 rebounding'toward the form orplate cylinder 3, is illustrated in theac'companying Fig. l.

9 6 1s a spring rod 'pushing from an abut ment 97 on the press frame 93, against an arm 98 fast to the rock shaft 65 already doscribed. It is to be noted that both rod 96 and arm 98 are so positioned relatively to each other, that they are on a dead center when the inking rollers 37 are down on the cylinder 3, andthat as soon as the said rollers 37 are tripped, z'. 6., at the moment the device 70 comes up to its stop and Would start the rollers 37 rebounding if it were notprevented, the rod 96 exerts its maximum leverage on the arm 98 and so holds the inking rollers 37 stationary.

A preferred constructional form of the above mentioned means by which the cylinder tripping means of the said pending application are extended to the transfer cylinder, is illustrated in the accompanying Fig. 2. The loose gear 9 on the transverse shaft 12 (both in the pending application) rocks a second and similar gear loose on a second and parallel shaft 100. This second gear 99 has a long boss 101 which provides a bearing for a loose pawl plate 102 having an arcual recess 103 establishing two shoulders 104, 105, as well as for a radial arm 106, the outer end of which latter is connected by a link 107 to a similar arm 108 on a transverse shaft 109 near the transfer cylinder 2. The outer end of the boss 101 has, fast on it, a radial arm 110 upon the outer end of which is pivoted a double pawl 111, the noses of which are positioned to engage the respective shoulders 104, 105, just mentioned, alternately, according to the direction in which the pawl 111 is rocked. This rocking is effected from the feeders foot pedal 24, a similareccentric grooved arm 112 and intermediate connections consisting of a bell crank lever 113 fast on a transverse shaft 114, an arm 115 fast to the" said shaft and engaging acollar 116 fast (for the purpose of this fourth part of the invention) on a horizontal rod. 117 sliding in guides 118,118, a spring 119.compressible and resilient between a collar 120 fast on the rod 116 and an arm 121 fast to the pivot shaft 122 of the said arm 112; the said arm 11.2 engaging a roller 123 on an arm 124 projecting inia suitable direction from the pawl. Each end of the transverse shaft 109 last mentioned, has a radial arm 125 fast to it, the outer end of each of these arms being pivotally connected by a link 126 to a similar arm 127 fast to an eccentric journal 128 at the respective end of the, transfer cylinder 2, so that the latter is an latter thus becoming a switch to switch the tripping automaticity on to the axis of the transfer cylinder 2.

A preferred constructional form of the above mentioned means by which the transfer cylinder can be left in contact with the form or plate cylinder while the latter is being rolled up is illustrated in the accompanying Fig. 2. It must be understood that the impression cylinder will remain tripped for the time being. These means are to be understood as including any device which is capable of preventing the depression of the foot pedal 24 already described, by the press feeder, tripping the transfer cylinder. According to the said form, the collar 116 above described is operatively releasable from the rod 117 to at least the extent of the rock of the bell crank lever 113 not affecting the said rod. Thus when the two screws 129 are loosened and the collar 116 moved up to the stop 130 on the end of the rod 117, the lever 113 will rock without moving thelatter.

Having described our invention, we declare that what we claim and desire to secure by Letters Patent is 1. The combination a with a rock shaft forming part of the automatic means for tripping the cylinder inking rollers of a two revolution printing press, of means for man- 'ually disconnecting two adjacent and connected members of the said automatic means, for holding them disconnected for the desired time, and for reconnecting them, consisting of an arm fast and a sector plate loose on the said shaft and in parallel planes, a spring plunger working in the said arm to and from the said sector plate in a direction parallel with the said shaft, a socket in the sector plate in which'the plunger can engage and a detent to hold the engaged from the socket.

2. Automatic means for preventing the inking rollers rebounding toward the form or plate cylinder at the moment they reach their tripped position, consisting of an arm fast on a rock shaft of the automatic mechanism for tripping the inking, rollers, with plunger disa spring rod adapted to push radially along the said arm from a fixed abutment, the arrangement of arm and rod beingsuch that they will be at dead centers at the moment the said rollers reach their tripped position. In witness whereof we have hereunto set our hands in the presence of two witnesses.

HERBERT PEARCE. THOMAS ROBERT GILLE'IT PARKER. FRED WESLEY WRIGHT. Witnesses:

JOSEPH LAMB, FRED $PENOE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. G. 

